Asphalt-pavement-cutting machine



May 5, 1925` 1,536,178

I W. J. HACKETT ASPHALT PAVEMENT CUTTING MACHINE Filed oct. 2o, 1920 5 sheets-sheet 1 May 5v, 1925.

w. J. HAcKETT ASI-HALT PAVEMENT CUTTING MACHINE May 5,1925. 1,536,178 i l W. J. HACKETT ASPHALT PAVEMENT CUTTING MACHINE Filed Oct. 2O

May 5, 1925. 1,536,178

w. .1, HAcKETT ASPHALT PAVEMENT CUTTNG MACHINE Filed Oct. 20, 1920 5 SheetS-Sheec 4 May 5, 1925. 1,536,178

l w..1` HACKETT v ASPHALT PAVEMENT CUTTI'NG MACHINE Filed Oct. 20, 1920 5 Sheets-Sheet 5 Irma/07W Patented May 5, 1925,

'PATENT WILLIAM J. HAo''lrr, 1F .T Ar'frizslrovviv, NEW YORK.`

.aspiranti PAVEMENT-@WING MACE.

Aiapiitidn filed otbr 20, 1920.v serial No. 418,169.` l

a citizen of the United Staltee, and `residei'it of Janestoivn', county of Chautauqua, State 5 of `New York, have inveiite'd certain `new and useful Improvements in Asphalt-PavementCutting Machines, of Whichthe fll`oW- ing` is a speeifieatiol'i. l i

This `i nifelation Vrelates tio an imprvemeiit in Cutting machines and particularly in such rha'ehines equipped With circular Cutting' saws.V

One objefe't of this invention is to pro- 'diie/'ei cutting' niaeli'ine in which the cutting r operation is` peiftoined by one "oifniore eire'u'lar safvvs aetiii'tg;y Vifion ythe surface on vvliieh. the machine' ifs supported.

. Another eet of this" invention to pro- "oiitti'g niahine leirbiilar eiitting Sawvs mounted Obliquely to the Inaehinel and to the surface operated upon.

Another object is to produce a cutting maeh'ine in Whieh the euttin'g" mechanism and the propellihgv ni'ehanisin' operate in fixed remede t@ een ether.

l further db 'eet isl to produce/Mal, eiroulfar savv having interlocking and independently reinov'able blades.

Other objects jvill appear from an ex-` animaba Orf fhesfpeeieeeuon ma the drawings ivhieh forni a part thereof and iiil Fig. 1 is a side elevation of one embodinient of Ithis invent-lori;

35 a frontelevatioii;

Fig'. 3 is a rear elevatioh; Fig. 4 is @toppled view,

5 is a` bottoni VW; Fig. l5 lbngitudiiial sec-tin taken on 40 the liiie (if-6 in .5; s y i y Figp'is afsectinal view onthe line 7-77 in Fig. `6` showing part .of the gear eonneetions; l A. Fig, 8 1S a `SCiin tal ofi the line 8 8 45 iii Ifigt'i;`

y 9, 11, and 12 aredetails" of the inaehine; j

Fig. 101s a seet talii on the line "-10 in Fig. 4; i

ri rr is a @fees see-eener al@ sae aken ontheline la7-11 13;

Figs. aaa 1e are Stationr views ofthe a rhodiia- `tionof the blade mounting.

i Fig; 2o is a. Section taken mi ui the -20 in Fig. 19. i

Referring to the drawings the refereliee numeral 10 designates the fran'iel f the machine, here shown composed of angle bars bolted or otherwise fastenedtogether in reetangulai' forni, the side bars 11 being I- bearns and the cross bai's12 being channel beams with the upper and lower fianges 13 aiid 14 projecting inwardly. Onthe rear end of the frame is a priine mover 15, slipported upon the rear Cross bar 12 and an intermediate cross bar 1G. The `prime Iiiover shoivn is a' gasoline liiotoi' but obviously other I'nealis 'Could be substituted therefor desire'd. V y l M Carried on supports 17 nioiintedon the sidebars 11 is a Cross shaft 18 diiyeii from the prinie niover 15b'y aiehain 19 connecting the sprocket 20 on `the fjrinie noverwith the sprocket 21 keyed to the shaft. Freni the shaft 18 power' is distributed to the various noving Larts of the machine by gearing tb be described later' in detail so that the shaft 18 vvill hereafter be referred to as the` dis'- tribiitef shaft.`

k Parallel to'aiid belovv the distributer shaft is a `C'r-ss"shaft 22 mounted in the side bars 11" `ivhieh the traction Wheels aredrivel and hence referred to hereafter as the traeto'n shaft. Theftraetion shaft 22 which is driven from the distribilfer shaft 18 the chain 23 running over the Sprockets 24` and 25 has .splined. thereon a double gear collar 426 which is moved axially `thereon by Ineans of the lshifting',lever27 through the `link and uejpivoteu please, having arms, 3o restingin the groove ofthe eollar` suitable segfrnent1 32 and looking bar 33 are provided to hold thelever 2f( in the desired Positenf-. A The eollar 26 `carries tvv'o faeedbevel gears bevel gear Bvith `ivhieh either .gear 3 4 oi 3 5 een be throvv'n into engagement bythe lever 27,. ,Furtherniorevthe collar"` may also be brota-gai am' an .intermediate paaien .so that ithr gear' 341101* 35' will engage' die 34` and. 35l between which positioneda gear 36. In order to determine quickly and accurately the desired position of the collar three notches are provided in the segment 32. When the lever' is fixed by the forward notch the gear 34 engages the gear 36 (see Fig. 6), when fixed by the rear notch the gear 35 engages the gear 36, and when fixed by the intermediate notch both gears 34 and 35 are idle.

The gear 36 is carried by a longitudinal shaft 37 supported by a bracket 38 mounted on the side bar 11 and having at its other end a bevel gear 39 which engages a bevel Igear 40 mounted on the live front axle 4l of the machine. The axle 41 is supported by the side bars 11 and on it are fixed the front driving wheels 42. It will be noted that the gears 34 and 36 drive thc machine forward while the gears 35 and drive it backward.

The rear wheels 43 by which the machine is steered are separatel)v and rotatably mounted in the manner shown and dci-fcribed in my co-pending application Serial No. 404.978 filed August 21, 1920 and are Controlled by the steering bar 44 through the arms 45. the connecting links 46, and the intermediate plates 47. Suitablebraces 48 arc provided to support the bar which has a pivoted handle 49.

On the front of the side bars 11 are mounted supports 50 for the cutter mechanism. Suitably carried by the supports 50 are hollow shafts 51 and 52 mounted to rotate and in which turns a hollow shaft 53.

F The shaft 53 is driven from the distributer shaft 18 by a chain 54 running over sprocket 55 on the shaft 18 and sprocket 56 on the shaft 53. At each side of the sprocket 56 which is pinned or otherwise fastened to the shaft 53 are fixed or integral therewith clutch collars 57 and 58 with which clutch collars 59 and 60 keyed on the hollow shafts 51 and 52 are adapted to engage. The clutch collars 59 and 60 are shifted into and out of mesh with the collars 57 and 58 by levers 61 and 62 through links 63 and 64 and pivoted plates 65 and 66 respectively. Segments and locking bars similar to the seg ment 32 and bar 33 are provided to determine the positions of the levers.

By the construction described below the hollow shafts 51 and 52 operate the circular cutting saw mechanisms 67. Since these mechanisms are identical one only will be described in detail but the same reference numerals will be applied to corresponding parts of both.

The cutter mechanism 67 comprises a frame 68 carrying at the bottom a circular saw 69 fixed on a cross shaft 70 at the outer end of which is a bevel gear 71. Mounted in brackets 72 at the side of the frame is a longitudinal shaft 73 having at one end a bevel gear 74 in engagement with the gear 71 and at the other end a gear 75 which meshes with a gear 76 at the end of the hollow shaft. The saw is thus operated when the hollow shaft is set in motion by the gears 76, 75, shaft 73, gears 74, 717 and shaft 70.

The cutting mechanism is mounted to engage the surface to be operated upon at an angle and is pivoted on the hollow shaft so that the cutter can be raised out of engage ment with the surface as shown by the dotted lines in F ig. 6. Further it is desired toV regulate the depths ofthe cuts by raising or lowering the mechanism. This is done by a lever 77 connected by a link 78 with an angle plate 79 pivoted on a bracket 80 of the support 50. To one arm 81 of the plate 79 is fastened the link 78 while the other arm 82 is connected by a link 83 to a bracket 84 on the frame 68 near the saw.

The lever 77 has a locking bar 85 which engages with notches in the segment 86 to hold the lever in the desired position. A plurality of notches are provided in the segment at such distances apart that when the lever is shifted from one notch to the adjoining notch the cutting depth is increased or decreased a fixed amount.

Pivoted on a bracket 87 fixed to a side bar 11 opposite the bracket 38 is a sleeve 88 in which turns a shaft 89 having at one end a bevel gear 90 and at the other end a worm gear 91. On the traction shaft 22 is mounted a worm 92 and on the shaft 41 a bevel gear 93 which are positioned to mesh respectively with the worm gear 91 and the bevel gear 90. The sleeve 88 is oscillated on the bracket 87 by a lever 94 connected by a link 95 with an arm 96 of a pivoted plate 97 the other arm 98 of which is connected by a link 99 with the sleeve 88 in advance of the bracket 87. The plate 97 turns on the hollow shaft 51 and is positioned by collars 100 and 101 each fastened by pins 102 to the shaft as shown in Fig. 9. lllhen the sleeve is turned on its pivot by the lever 94 the bevel gear 90 meshes with the bevel gear 93 and the worm gear 91 meshes with the worm 92. Thus through the traction shaft 22 which rotates continuously the axle 41 and the wheels 42 are set in motion. It will, of course. be understood that when the location for the cutters to operate is reached the sleeve 26 will be shifted into idle position out of engagement with the gear 36. The ratio of the worm 92 and the worm gear 91 is such that the machine is moved forward slowly as the saws revolve thus feeding them to the work. It has been determined that the most satisfactory arrangement is for the machine to advance three-quarters of an inch at each complete rotation of the saws but other arrangements can be made if desired.

The saw 69 comprises a body plate 103 having a flange 104 at one edge, the flange lift loo

lll)

aiming with um 'edge or uit lpute t tifcular nrecess iii Which are seated cutting tudes 105 and in posant by a sag' paaioe @inspect ai it@ einigt a by' tous 107;

"llie base ortion 108 of the blade 10,5 has in its front odge a rectangulainoiich 109 and on its rear edge a rectangularprojection 110, bothnotcli and projection having the same outline.` then the blades are assembled in the saiv the projection 110 of each blade enters tlienot-ch 10i) of the adjacent blades` so that the blades cannot slip out radially. Through certain of theblade holes 111 are provided through `vifhich the bolts 107 holding the ring 106 to the flange is much wider than the rear edge 113 and the outer face is curved as at 114-, the rear edge being near the flange 104 while the cutting edge projects some distance ,from the flange. The front and side faces'of the cutting portion arecurved and cut under' so that the edges 112 `stand free and the tips 115 of the edge are equidistant from the center plane. of the saw.

In place of the notches 109 and the projections A the base portion of each blade may have semi-circular notches which When the blades are assembled formcircular holes 116 through which dovvels 11T on the flange 10a project to prevent radial slipping of the blades.

As described above and as sho-Wn in Figs. 1 to 5 inclusive the frames 68 for the saws are at an angle to the machine so that the tips of the blades strike the pavement iirst, thus facilitating the cutting of a hard surface. This arrangement is also of great` advantage when the machine is used to cut Worn pieces of asphalt from a pavementn The cut resulting is a groove with beveled edges and the edge of the good pavement can be joined to the asphalt patch Without any further trimming or straightening. Moreover the cut is clean and there is no tendency for the good pavement to stick to the cutter and be raised and broken by it as is the case when a chopper is used. Also the material is actually removed along the line of the cut so that the cut can not be sealed by traffic before the Worn portion is removed.

Conditions, however, sometimes arise in which it is of advantage to mount the frames 68 lparallel to the machine so that the full edge 112 strikes the surface. The construe tion shown in Fig. 8 is then used. Comparing this with the construction shown in Fig. 3 itvvill be noted that the shafts 51, 52, and 53 are. shorter and that certain changes are made in the supporting and pobrackets 118 from the cross bar `12 is a' platform `119 on ivhili the operator stands. It will `be noted tliatth'e levers and handles referred to above by `which the "operation of the various parts of the lhach'iiie is controlled are all` located at the rear so to be in easy reach of the operator Vand that the eiitirleiiiechanisin is operable one mail.

In Igeneral 4use only one ftutter iiill be operated at a time but obviously both cutters can by the mechanism described above be brought into operation siiniiltaiieou n sin be notai that what, uit willen ie arelreferred to as driving 1af'lieels only one of them is shown as lined to the shaft 11. Referring to Figs; 2 and 8 the right it] el is pinned to the shaft While the left Wheel is heldin place by cellars 120 lpinned te the shaft; By this construction the machine can be quickly and easily turned i'v'itliout the lise of a differential or compensating device;

liVhile certain `einbodinien'ts" ofthis` invention have been shown and described applicant is not to be limited thereby since it is obvio us that others Vmay be nlad'e Witheut departing from the spirit and scope of the invention as set forth in the following claims.

Having thus set forth my invention that which I claim as new and for Which I desire to obtain the protection of Letters Patent is the following:

1. In a machine for cutting asphalt pave ments, traction elements for propelling the machine over said pavements, inclined cutters operatingupon the pavement, separate frames for said cutters pivotally mounted on said machine laterally beyond said traction elements, means for raising said frames independently, a prime mover mounb ed upon said machine, a drive shaft rotated by said prime mover in a predetermined direction and gearing connecting said drive shaft with said traction elements and said cutters.

2. In a machine for cutting asphalt pavements, traction elements for propelling the machine over said` pavement, inclined cutters operating upon the pavement, separate frames for said cutters pivotally mounted on said machine laterally beyond said traction elements, means for raising said frames independently, a prime mover mounted upon said machine, a drive shaft rotated by said prime mover in a predetermined direction, gearing connecting said shaft Vto said traction elements including means for controlling the direction of movement of the ma* chine, and gearing connecting said shaft to said cutters.

3. In a machine for cutting asphalt pavements, traction elements for propelling the machine over said pavement, inclined cutters operating upon the pavement, sepa ate frames for said cutters pivotally mounted on said machine laterally beyond said traction elements, a prime mover mounted upon said machine, a drive shaft rotated by said prime mover in a predetermined direction, gearing connecting said shaft to said traction elements including means for controlling the direction of movement of the machine, gearing,` connecting said shaft to said cutters, and independent mechanism for raising and lowering; said cutters.

4. In a machine for cutting asphalt pave ments, Wheels for propelling the machine over said pavement, circular inclined cutters located outside said Wheels for operatingupon the pavement, separate frames for said cutters pivotally mounted on said machine, means for raising' and lowering said frames independently, a prime mover mounted upon said machine, a drive shaft rotated by said prime mover, gearing connecting said shaft With said Wheels and said cutters and levers for controlling the actuation of said Wheels, the direction of the movement of the machine, and the operation of said cutters.

5. In a machine for cutting asphalt pavements, Wheels for propelling the machine over said pavement, circular cutters located outside said Wheels for operating upon the pavement, separate frames for said cutters pivotally mounted on said machine, a prime mover mounted upon said machine, a drive shaft rotated hy said prime mover, gearing connecting said shaft with said Wheels and said cutters and levers for controlling thel actuation of said Wheels, the direction of movement of the machine, and the operation of said cutters and for raising or lowering' said cutter frames independently.

6. In a machine for cutting asphalt pavements, Wheels for propelling the machine over said pavement located at one end of the machine, circular cutters outside said Wheels for operating upon the pavement, separate frames for said cutters pivotally mounted on said machine, a prime mover mounted upon the machine adjacent the opposite end, a platform at said end upon which the operator stands, gearing connecting said prime mover with said Wheels and cutters and levers at the platform end of the machine for raising or lowering` said cutter frames independently.

In testimony whereof, I afX my signature.

ILLIAM J. HACKETT. 

